2. Why is mistletoe called partial parasite!
3 Why do some plants eat insects? 14
4 What is autotrophic mode of nutrition? 7
Sr What is saprotrophic mode of nutrition? 13
Short Answer Type-Il Questions:
1. How can we decolourise a leaf? Explain.
2 What are plant parasites? Name any two plant parasites. 13
3. How does the pitcher plant catch its prey 4
Differentiate between parasitic and insectivorous plants. 13
5. Algae and fungi live together in lichens.
(a) What is this association called?
(b) What value can we learn from this association in nature?
Long Answer Questions:
1. Write an experiment to show that sunlight is necessary for ph
2. How do Rhizoblum bacteria andleguminous plants help each
Answers
Answer:
Q NO 2- Mistletoe is called a partial parasitic because this plant has green leaves. these green leaves make their own food. But this plant recipes water and minerals from host plant to synthesise food.
Q NO 3 - carnivorous plants are plants which get nutrients from trapping and eating animals. they are often called insectivorous plants, because they trap insects. Since they get some of their nutrition from animals, carnivorous plants can grow in places where the soil is thin or poor in nutrients.
Q NO 3 - The mode of nutrition in which an organism prepares it's own food from simple inorganic raw materials is called autotrophic mode of nutrition.
Q NO 4 - Saprophytic plants derived their food from dead and decaying organic Matter. they are varied in colour and often have no leaves.
1*Why is mistletoe called partial parasite?
Answer:And, so on… The mistletoe is dependent on a tiny bird called a flowerpecker to disperse its seeds. ... This makes the mistletoe a partial parasite. This means that it grows on other plants and trees and draws only the raw material from the host.
2*Why do some plants eat insects?
Answer:Meat-eating, or carnivorous, plants can trap and digest insects and other small animals. They do this to obtain the vital nitrogen that they need to grow. Most plants absorb enough nitrogen from nitrates in the soil.
3*What is autotrophic mode of nutrition?
Answer:Those organisms that can make food themselves from simple substances like carbon dioxide and water are called autotrophs. Their mode of nutrition is referred to as autotrophic. They do this by the process of photosynthesis. All the green plants are called autotrophs.
4*What is saprotrophic mode of nutrition?
Answer:saprotrophic nutrition is an process of chemoheterotrophic extracellular digestion involved in the processing of. dead or decayed organic matter. it occurs in saprotrophs or heterotrophs , and is most associated with fungi . (for example : mucor and Rhizobium) and soil bacteria.
5*How can we decolourise a leaf? Explain.
Answer:heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour) wash with water and spread onto a white tile. add iodine solution from a dropping pipette.
6*What are plant parasites? Name any two plant parasites.
Answer:They make up about 1% of angiosperms and are in almost every biome in the world. All parasitic plants have modified roots, called haustoria, which penetrates the host plants, connecting them to the conductive system – either the xylem, the phloem, or both.
7*How does the pitcher plant catch its prey 4
Differentiate between parasitic and insectivorous plants.
Answer:Example -Pitcher plant, Sundew plant, venus fly-trap plant etc.However, the plants which live on or inside another organism and derives their food from it are called parasitic plants. ... Parasitic plants depends on other plants for their living but insectivorous plants feed on insects for their living.
8*Algae and fungi live together in lichens.What is this association called?
Answer:A lichen is not a single organism; it is a stable symbiotic association between a fungus and algae and/or cyanobacteria. ... The lichen symbiosis is thought to be a mutualism, since both the fungi and the photosynthetic partners, called photobionts, benefit.
9*Algae and fungi live together in lichens.What value can we learn from this
association of nature.
Answer:algae and fungi live together and help each other. 2. we learn that cooperate with each and help each other. LICHENS show symbiotic relationship between orthographic algae and some species of bacteria in the heterotrophic fungus.
10*Write an experiment to show that sunlight is necessary for ph
Answer:Sunlight is needed for photosynthesis because the solar energy is what is converted to chemical energy by the plant's chloroplasts. This energy is necessary for the production of glucose, which provides usable energy for the plant. The chloroplasts contain the green pigment chlorophyll, which absorbs the sun's light.
Experiment:What happens when we cover a leaf of plant with black piece of paper?
If the leaf is covered by black piece of paper on both top and bottom. It should turn yellow after a week, reason behind this is that chlorophyll will no longer have access to sunlight.
11*How do Rhizoblum bacteria andleguminous plants help each?
Answer:The Rhizobium bacteria helps leguminous plants by converting atmospheric nitrogen to soluble form for the plant to make proteins and in return the plant provides the bacteria with sugars or food. This is a relationship in which both work together and are benefited and have a mutual relationship.
Thus there exists a symbiotic relationship between the Rhizobium and leguminous plants. Peas, beans etc. are leguminous plants or legumes which are plants which have root nodules. they help rhizobium bacteria as they provide them with shelter in their root nodules and food. thus legumes help rhizobium bacteria.
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